Arbuscular mycorrhizal fungus inocula from coastal sand dunes arrest olive cutting growth under salinity stress

Kavroulakis, Nektarios; Tsiknia, Myrto; Ipsilantis, Ioannis; Kavadia, A.; Stedel, Catalina; Psarras, Georgios; Tzerakis, Constantinos; Doupis, Georgios; Karpouzas, Dimitrios G.; Papadopoulou, Kalliope Κ.; Ehaliotis, Constantinos

doi:10.1007/s00572-020-00963-x

Cited by 13 publications

(11 citation statements)

References 78 publications

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“…Some AMF species are more efficient on the host plant than others, given the existence of genetic and/or physiological factors between the fungal symbionts and their hosts (Coutinho et al 2019;Klironomos 2003;Van der Heijden et al 1998). These results corroborate other studies in the Mediterranean region on other forest species that had shown high mycorrhizal colonization rates (Jadrane et al 2021;Kavroulakis et al 2020;Manaut et al 2015;Ouahmane et al 2007a). A significant enhancement of the growth parameters of the Argan seedlings in their early growth stage was observed for the different fungal inocula.…”

Section: Discussionsupporting

confidence: 91%

Application of Arbuscular Mycorrhizal Fungi Isolates from Semi-arid Mediterranean Ecosystems as Biofertilizers in Argan Tree Development

Outamamat

Dounas

Rachid

et al. 2021

J Soil Sci Plant Nutr

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In semi-arid Mediterranean ecosystems, biotic and abiotic constraints have led to intense forest destruction and ecosystem deterioration and particularly to limitation in the production of Argan tree. Reforestation is thus more than ever a major challenge and an absolute necessity. The use of arbuscular mycorrhizal fungi (AMF) is of great importance in the processes of sustainable regeneration of the vegetation cover, given their roles in the improvement of plant growth and in the protection of soils. In the current study, Argan seedlings were inoculated with five arbuscular mycorrhizal fungi complexes and six arbuscular mycorrhizal fungi monospecific isolates. Growth, nutrition, photosynthetic pigments, and mycorrhizal colonization were under study. The soil samples were obtained from different ecosystems. Trap culture with Maize (Zea mays L.) was used for the production of mycorrhizal inoculum directly for complexes. Monospecific isolates were then produced from spore suspension using the technique of micropipette tips. Germinated seeds of Argan tree were inoculated separately with eleven fungal inoculants, under nursery conditions. Eight-month aged seedlings were compared for their growth and nutritional status. All the considered AMF inoculants stimulated significantly the growth of Argan seedlings; an increase in plant height between 33 and 70% was recorded. The aerial dry weight showed an increase of 62 to 124%, and the root dry weight showed an increase of 24 to 86% compared to the control. Similarly, the mineral contents in inoculated seedlings were significantly increased compared to the control non-inoculated seedlings. The analysis of the chlorophyll contents in leaves showed a significant improvement in inoculated seedlings. In conclusion, this first use of arbuscular mycorrhizal fungi isolates had shown that either complexes or monospecific isolates could improve significantly growth, mineral nutrition, and photosynthesis of Argan seedlings under nursery conditions. Hence, the use of inoculation with suitable consortium from these isolates is a recommended eco-friendly strategy for the restoration of degraded Argan ecosystems.

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Section: Discussionsupporting

confidence: 91%

Application of Arbuscular Mycorrhizal Fungi Isolates from Semi-arid Mediterranean Ecosystems as Biofertilizers in Argan Tree Development

Outamamat

Dounas

Rachid

et al. 2021

J Soil Sci Plant Nutr

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“…It is thus fitting that, in this study, the increase in plant biomass can be attributed to the ability of AMF to enhance plant growth by developing external hyphae, which in turn increases soil surface area available for exploitation [42]. Moreover, several scientists have highlighted the beneficial effects of AMF on plant responses to salt stress [43][44][45].…”

Section: Discussionmentioning

confidence: 62%

“…Inoculation with AMF has been shown to better serve plant physiological processes, particularly nutrient uptake, and, therefore, plant tolerance to salt stress [48]. In this study, the amelioration of nutrient uptake (P, N, K, Mg, and Ca) under saline conditions was greater when seedlings associated with AMF inocula and particularly with the A9 complex were isolated from the saline soil followed by the native complex A10 and the respective monopolar isolates [43]. AMF have been reported to improve the N and P contents of plants grown in saline soils [49] and reduce the uptake of Na [50].…”

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 94%

“…Previous studies have suggested that salinity induces a considerable reduction in date palm seedlings' biomass [11,43]. In addition, the application of different inocula ameliorates the studied growth parameters, such as plant height, fresh and dry weight of shoots, and roots [43]. Generally, in the present work, the best results were obtained when the seedlings inoculated with the exotic complex A9 originated from a saline soil out of the date palm ecosystem and with the native complex A10 originated from the date palm ecosystem in the presence or absence of salt stress.…”

Section: Discussionmentioning

confidence: 99%

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Application of Native or Exotic Arbuscular Mycorrhizal Fungi Complexes and Monospecific Isolates from Saline Semi-Arid Mediterranean Ecosystems Improved Phoenix dactylifera’s Growth and Mitigated Salt Stress Negative Effects

Outamamat

Bourhia

Dounas

et al. 2021

Plants

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The date, the palm tree (Phoenix dactylifera L.) is an important component of arid and semi-arid Mediterranean ecosystems, particularly in Morocco where it plays a considerable socio-economic and ecological role. This species is largely affected by desertification, global warming, and anthropic pressure. Salinity is a very worrying problem that negatively affects the growth and the physiological and biochemical activities of the date palm. In these arid zones, the main challenge is to develop new environmentally friendly technologies that improve crop tolerance to abiotic restraints including salinity. In this sense, Arbuscular mycorrhizal fungi (AMF) have received much attention due to their capability in promoting plant growth and tolerance to abiotic and biotic stresses. It is thus fitting that the current research work was undertaken to evaluate and compare the effects of native AMF on the development of the growth and tolerance of date palm to salt stress along with testing their role as biofertilizers. To achieve this goal, two complexes and two monospecific isolates of native and non-native AMF were used to inoculate date palm seedlings under saline stress (0 g·L−1 Na Cl, 10 g·L−1, and 20 g·L−1 Na Cl). The obtained results showed that salinity drastically affected the physiological parameters and growth of date palm seedlings, whilst the application of selected AMF significantly improved growth parameters and promoted the activities of antioxidant enzymes as a protective strategy. Inoculation with non-native AMF complex and monospecific isolates showed higher responses for all analyzed parameters when compared with the native complex and isolate. It therefore becomes necessary to glamorize the fungal communities associated with date palm for their use in the inoculation of Phoenix dactylifera L. seedlings.

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Bioprospecting for plant resilience to climate change: mycorrhizal symbionts of European and American beachgrass (Ammophila arenaria and Ammophila breviligulata) from maritime sand dunes

Grassi,

Pagliarani,

Avio

et al. 2024

Mycorrhiza

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Climate change and global warming have contributed to increase terrestrial drought, causing negative impacts on agricultural production. Drought stress may be addressed using novel agronomic practices and beneficial soil microorganisms, such as arbuscular mycorrhizal fungi (AMF), able to enhance plant use efficiency of soil resources and water and increase plant antioxidant defence systems. Specific traits functional to plant resilience improvement in dry conditions could have developed in AMF growing in association with xerophytic plants in maritime sand dunes, a drought-stressed and low-fertility environment. The most studied of such plants are European beachgrass (Ammophila arenaria Link), native to Europe and the Mediterranean basin, and American beachgrass (Ammophila breviligulata Fern.), found in North America. Given the critical role of AMF for the survival of these beachgrasses, knowledge of the composition of AMF communities colonizing their roots and rhizospheres and their distribution worldwide is fundamental for the location and isolation of native AMF as potential candidates to be tested for promoting crop growth and resilience under climate change. This review provides quantitative and qualitative data on the occurrence of AMF communities of A. arenaria and A. breviligulata growing in European, Mediterranean basin and North American maritime sand dunes, as detected by morphological studies, trap culture isolation and molecular methods, and reports on their symbiotic performance. Moreover, the review indicates the dominant AMF species associated with the two Ammophila species and the common species to be further studied to assess possible specific traits increasing their host plants resilience toward drought stress under climate change.

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Arbuscular mycorrhizal fungus inocula from coastal sand dunes arrest olive cutting growth under salinity stress

Cited by 13 publications

References 78 publications

Application of Arbuscular Mycorrhizal Fungi Isolates from Semi-arid Mediterranean Ecosystems as Biofertilizers in Argan Tree Development

Application of Arbuscular Mycorrhizal Fungi Isolates from Semi-arid Mediterranean Ecosystems as Biofertilizers in Argan Tree Development

Application of Native or Exotic Arbuscular Mycorrhizal Fungi Complexes and Monospecific Isolates from Saline Semi-Arid Mediterranean Ecosystems Improved Phoenix dactylifera’s Growth and Mitigated Salt Stress Negative Effects

Bioprospecting for plant resilience to climate change: mycorrhizal symbionts of European and American beachgrass (Ammophila arenaria and Ammophila breviligulata) from maritime sand dunes

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